One of the Waterboxx® plant cocoon users came with the following solution if you are planting on a clay soil (80%): He didn’t place clay soil in the eight-shaped hole of the Waterboxx® plant cocoon. During the winter, because it is continuously wet, this soil attracts snails inside the hole. The snails damage the sapling by eating leaves and small branches (e.g. citrus saplings). It is better to put 100% sand that is sharp. It injures snail bodies and also repels them. It was a success!